Envelop.



H. G. PlEL.

- ENVELOP. 7 APPLICATION FILED SEPT- 14. 1914.

1,136,713 Patented Apr. 20, 1915.

HERMAN G. PIEL, F INDIANAPOLIS, INDIANA.

ENVELOP.

Specification of Letters Patent.

Patented Apr. 20, 1915.

Application filed September 14, 1914. Serial No. 861,610.

0 all UjilOl/t it may concern v Be it known that I, HERMAN Gr. PIEL, a citizen of the United States, residing at Indianapolis, in the county of Marion and State of Indiana, have invented certain new and useful Improvements in Envelops, of which the following is a specification.

This invention relates to envelops, and more particularly to envelops of that class in which provision is made for preventing unauthorized persons from tampering with the contents of the same, and has for one of its objects to provide an envelop of this character which issimple in construction as Well as easy and cheap to manufacture.

Other objects will appear and will be better understood by reading the specification in connection with the accompanying drawings, in WlllCll-- n Figure 1 is a view of the blank from which the envelop is constructed. Fig. 2 is a View showing the envelop partly folded, and Fig. 3 is a view of the back of the en- I velop after the same has been sealed.

Referring to the drawings by numerals, 5 designates the front or body portion of my improved envelop and (3 the flap which is first folded over in forming the same. A flap 7, formed on the end of the body portion opposite to that carrying the flap 6, is adapted to be folded over upon the flap 6 and fastened thereto byvmeans of the mudlage or other adhesive substance 8 carried on the overlapping end of the flap 7. A slit 9 is cut in the flap 7 at a point adapted to register with a small flap or tongue 10, formed on the outer end of the flap 6, when the flaps 6 and 7 are in their folded position. The tongue 10 is providednvith mucilage or other adhesive substance on its under face,,and is adapted to be inserted through the slit 9 when the flaps are being folded and then turned back and fastened to the outer face of the flaps 7 by means of the adhesive 11.

A flap 12 is formed on the upper edge of A the body portion v5, and is provided with a slit 13, the purpose of which will subsequently appear. Another flap 14, is formed onthe lower edge of the body portion and has the tongue 15 extending therefrom, mucilage or other adhesive substance 16 being placed on the inner face of the tongue near the end thereof. The flap 14: is provided with mucilage orother adhesive subfastened to the flaps 6 and 7 by means of they adhesive 17, and the end of the tongue 15 turned over on the face of the envelop and secured by means of the adhesive 16.

A postage stamp as indicated at 18, is placed over the end of the flap 15 so that access to the interior of the envelop can not be had without destroying the envelop or leaving some trace of such action on the material of which the envelop s constructed 1 claim An envelop comprising end flaps and upper and' lower flaps, a tongue provided upon one of said end flaps, a slit of corresponding size formed in the other of said end flaps, said end flaps adapted to be folded upon said body portion, said tongue extending through said slit and adapted to be sealed upon the other of said end flaps, the edges of said upper and lower laps being cut at.

an angle relative to the body portion, a tongue formed from said lower flap, one longitudinal edge of said last mentioned tongue extending in direct alinernent with oneof the slanting edges of said lower flap,

the other longitudinal edge of said last mentioned tongue extending parallel with the other edge, said upper flap provided with an angularly disposed slip, said lower flap adapted to be sealed upon said end flaps and said first mentioned tongue, said last mentioned tongue extending through said last mentioned slit, from the under face of said upper fiap so that it may be folded and sealed upon the front of the envelop at a point adjacent one corner thereof.

In testimony whereof I ail-ix my signature in presence of two Witnesses.

HERMAN G. PIEL. Witnesses: MAE CRisLEn,

ANTON SGHAKEL. 

